Keysight 6811C Performance AC Power Source: 375VA, 300V, 3.25A, 6800 Series is a high-performance AC power source that provides precise and reliable power for testing electronic devices. It features a wide range of output voltages and frequencies, making it suitable for a variety of applications. The 6811C also includes a number of advanced features, such as harmonic compensation, power factor correction, and sequencing, which make it ideal for testing complex electronic devices.